It is an object of the present invention a method to obtain a
cartilage cell population enriched in
cartilage progenitor cells (CPCs), said method comprising culturing said cells in culture at a density between 10 and 500 cells / cm2. In a further aspect, it is here claimed a
population of
cartilage cells enriched in CPCs obtainable by means of said method, and their use in the treatment of chondral lesions or joint degeneration.